摘要
为了综合利用含稀土高炉渣,用"淬火法"研究了非等温过程含稀土高炉渣中铈钙硅石相的结晶行为,并讨论了其析出和长大的动力学规律。实验结果表明:铈钙硅石相的形核、生长与冷却速度有关。冷却速度小,形核少,粗化明显,有利于铈钙硅石相的长大。铈钙硅石相的开始析出温度为1310℃。当冷却速度为0 5℃/min时,其体积分数可达19%,平均半径为180μm。铈钙硅石相的析出动力学过程可近似用JMAK经验方程描述。
For comprehensive utilization of the blast-furnace slag bearing rare earths, the non-isothermal precipitation behavior of the calcium cerite phase in slag bearing RE was studied by quenching method, and the kinetics of precipitating process and crystal growth of calcium cerite phase were analyzed. The experimental results show that the nucleation and growth of calcium cerite phase is related to the cooling rate, ie the lower cooling rate can increase the calcium cerite growth and coarsening. The cerite phase starts to precipitate at around 1 310 ℃. When cooling rate is 05 ℃/min, the volume fraction of calcium cerite can be up to 19 % and its average crystal size will be 180 μm. The precipitation kinetics can be approximately described by the JMAK equation.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2004年第4期64-67,共4页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(50234040)
关键词
高炉渣
铈钙硅石相
冷却速度
析出
furnace slag
calcium cerite phase
cooling rate
precipitation
